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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 21, 2009
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Open Help Requests for GM
Help Request Answers
1996 Cadillac DeVille 4.6L traction control VIN: 1G6KD52Y3T
top of the day fellow techs. i havethis caddy riding up my back. this car came in with the traction and abs lights on.checked speed sensors,all working fine.checked for codes only code is 73.pcm-ebtcm signal fault.reserch tells me lost of serial data to pcm.if...
1999 Cadillac DeVille 4.6L Steering Wheel VIN: 1G6KD54Y9X
Hey Guys & Gals,I Have This 99 Caddy Problem & Don't Know Where To Begin.Here Is The Problem,When Sitting At An Idle While Holding The Steering Wheel In A Turned Posistion, The Wheel Pulsates like It Wants To Turn By Itself & Then Wants To Turn Back Slightly.A...
2004 Cadillac SRX 4.6L trans over heat VIN: 1GYEE63A74
trans temp message on information center after about 45 min test drive hook up cooler flow tester no flow any body seen this one.
2007 Cadillac SRX 3.6L tpms VIN: 1GYEE637X7
front tires were replaced with same size, left front tire was not repairable. tried to perform relearn per instructions in owners manual. would not chirp at left front tire, right front would, and neither rear tires would chirp. tried several times, both defla...
1995 Chevrolet Blazer 4.3L brake and signal VIN: 1GNDT13W2S
i hope i dont wast anybodys time on this one,but the brake lights, signal lights and emer, flasher dont work,third brake light works.on a CAR I DID IT WAS THE TURN SIGNAL SWITCH.THE FLASHER BUTTON is broke customer took out flasher i put it back sill have no l...
1995 Chevrolet Blazer 4.3L Stall VIN: 1GNCS13W6S
all repairs were done at a previous repair facility. after our inspection we noticed that the problem occurs after vehicle is driven for about fifteen minutes or so. vehicle dies like you shut off the key. when you try to restart you have spark and fuel but ve...
2000 Chevrolet Astro 4.3L steering VIN: 1GNDM19W8Y
vehicle has a rubbing noise while turning left slowly.sounds like a plastic boot rubbing on something.this is a hydro boost system but noise seems to be in steering column or interm shaft should be easy to find .i hpe somone has seen this already.thanks
2000 Chevrolet Venture 3.4L Cooling Fans
I have a 2000 Chev. Venture, with cooling fans inoperative even with the A/C turned on. I can get them to turn on by disconnecting the Coolant Temp Sensor. I checked the relays, and fuses, and had a brief look at the wiring, all appeared to be OK. Anybody had ...
2000 Chevrolet Cavalier 2.2L rear brakes VIN: 1G1JC5244Y
Rear brakes lock up over frt. Tail end dives and abs works. Port valve in master cyl so master cyl was first replacement. Bled brakes. Fluid exits all wheel cyl's evenly. Wheel cylinders checked for sticking and binding. Springs and hardware intact. New shoes ...
2002 Chevrolet Silverado 1500 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEC14W22
Hi everyone, Vehicle is skipping pretty badly. History misfires show clearly that #4 and 6 are the culprit. I changed plugs and looked at the cap and rotor-looked good. Vacum readings are steady and high. Compression is 175psi on both problem cylinders. I no... Trouble codes: P0300
2002 Chevrolet Impala LS 3.8L starter relay VIN: 2G1WH55K72
2004 Chevrolet Express 3500 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GBJG31U54
van will sometimes idle low or stall at idle, usually in gear. I can not control the iac with scanner but I can control it with a separate controller hook up to the iac. has anyone run into this problem and can tell me if it's a wiring problem or something els... Trouble codes: P0506, P0171, P0174
2004 Chevrolet Silverado 2500 HD 6.0L driver info center controls VIN: 1GCHK23U74
Customer just got the truck,and brought it in with a complaint of steering wheel buttons for DIC not working,hooked up the MODIS and they dont switch on that either. Radio buttons on the wheel work fine. Then noticed odometer button on dash didn't do anything ...
2007 Chevrolet Malibu LS 2.2L wipers VIN: 1G1ZS57F46
I am working on this '07 Malibu. The complaint is that the wipers will intermittently stall for 1-3 seconds while in either low speed or intermittent wipe mode, and then continue to work normally. The vehicle was in the shop a week ago and we found that when t...
2002 GMC Sierra 2500 HD 6.0L reverse VIN: 1GTHK29U72
this truck has all forward gears, goes into overdrive and torque converter locks up, but this vehicle has no reverse, and it just happened all at once. thanks in advance for any info you guys might have.
2001 Pontiac Aztek 3.4L Fans stay running
The fans stay running all the time and the temp gage stays on cold replaced temp sensor with no luck
2007 Saturn Vue Green Line 2.4L engine VIN: 5GZCZ33Z77
This Vue is using at least 1qt of oil every 1000 miles.No leaks.Has anyone else seen this apparant problem?Spark plugs have a tan coating that could be oil related.Is this normal for a 2.4 with 50,000 miles to use this much? Thanks in advance.

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac Seville SLS 4.6L TCC circuit VIN: 1G6KS54Y71
First I want to thank everyone who replied. Many suggestions were in regard to the transmission internal hard parts and seals as per the bulletin listed in my original post. There was also mention of poor terminal contact at trans plug, poor ground, and a refl...
2005 Cadillac CTS 3.6L Starter VIN: 1G6DR56745
Well I am going to call this fixed although there was an issue. As you guys suggested this is a PCM fault. Car had been stood for a long time, battery went flat and the PCM had died. I replaced the PCM (special order from the US) and once fitted I could then, ...
1985 Chevrolet Cavalier 2.8L MIL Lamp on VIN: 1GJE67W0F7
first thanks to all who responded, closing post due to no more updates available. i still need help, i've checked grounds and control components all good. i still think i need a good prom. rechecked ecm ses light on steady procedure and came up with bad prom d...
1994 Chevrolet Lumina APV 3.8L Cuts out, MIL Lamp on VIN: 1GNDU06L6R
The costomer never returned my phone calls, I am sorry I have to close this without knowing if it is fixed. Trouble codes: P0341 (cam/crank error), P1361 (no control module toggle).
1996 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15RXT
Sorry this van left without being fixed. Everyone's help was great. The problem was still in the cam retard, no matter what we did it stayed at -46 degrees. Customer did not want to spend anymore money on this vehicle. Thank you again and sorry this was not fi... Trouble codes: P0340.
1998 Chevrolet K1500 Cheyenne 5.7L Mechanical VIN: 2GCEK19R4W
1999 Chevrolet K3500 6.5L Cuts out, Poor Fuel Economy VIN: 1GCHK33F2X
thank you all for the replies, i have called the customer back and we are going to get the truck back to replace the driver module and relocate it away from the pump. Trouble codes: P1216 (fuel solenoid response time too short).
2002 Chevrolet Avalanche 1500 5.3L information center VIN: 3GNEK13T22
After your helps we rechecked and found out that the new BCM was bad sewnt back to the deqlership and repaired it Thanks D. C.
2002 Chevrolet Blazer LS 4.3L front diff or transfer case VIN: 1GNDT13W62
This was different. the customer brought the vehicle to me to have the transfer case replaced. I test drove the vehicle and It felt like the front axle was not disengaging properly. I removed extension hose on front carrier and found the teeth on lock gears ro...
2004 Chevrolet Silverado 1500 5.3L blower motor VIN: 2GCEK19T64
Thanks for the help, I replaced the blower control module under the dash and now the blower works as planned.
2003 GMC Envoy XL SLE 4.2L No Start VIN: 1GKET16S73
Found right bank camshaft solenoid leaking into plug causing short in V-Ref circuit. Took a while to track down but vehicle is finally fixed. Trouble codes: P1120, P1220.
2005 GMC Yukon Denali 6.0L hydroboost ? VIN: 1GKEK63U75
The noise was coming from the hydroboost unit without a doubt... at least that was were it was heard and felt. however we did replace the unit with a GM updated part number, and the noise still remains. We did try a new belt to no avail. Seems they did have so...
2001 Oldsmobile Aurora 3.5L MIL Lamp on VIN: 1G3GR64H11
to repair the problem i took both air injection shut off valves off car and took them apart. i found moisture and carbon build up inside. i cleaned both of them and put them back on. reset KAM and drove vehicle. no more check engine light. thanks for all ... Trouble codes: P0410.
2001 Oldsmobile Aurora 4.0L Misfire, MIL Lamp on VIN: 1G3GS64C51
I guess I will have to chalk this one up on the loss column. customer didn't want to spend more than 2 hours on diag and I had exceeded that and then some. As I stated swapping coils didn't seem to affect missfire. I was starting to question valve sealing but ... Trouble codes: P0300 (random cylinder missfire).
2002 Oldsmobile Alero GL 3.4L security sys VIN: 1G3N52E72C
Thanks for the help, a new clutch coil fixed the problem. I had my customer drive car for a week with ac relay in and clutch unplugged. Fuse did not blow so I replaced coil and all is well. Thanks again!
1987 Pontiac Bonneville LE 3.8L stuck in 2nd gear VIN: 1G2HZ5130H
I think the trans is fixed, I pulled the valve body 3 times.Each time I removed every valve and cleaned the bores with nylon brushes. Some I had to use scotch brite on a rotary tool,washed out and blew out. Reassembled the body and twice the problem came back...
1990 Pontiac Trans Sport 3.1L MIL Lamp on VIN: 1GMCU06D8L
First, I found the flashing SES light was in field service mode. After reading the replies I turned the key on engine off. Then the fan comes on and code 12 starts flasing. The DLC was grounded. Found C110 not clicked all the way. That fixed the SES light...
2005 Pontiac Sunfire 2.2L Chain VIN: 3G2JB12F55
The rattling noise was the balance shaft/water pump chain. The hydraulic tensioner failed miserably. It did not produce tension and would not even freely move in and out. The chain guides appeared to be in good shape, but were replaced anyways. Very importa...
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